WASET
    D. S. Fardhyanti and  A. Damayanti,  Analysis of Coal Tar Compositions Produced from Sub-Bituminous Kalimantan Coal Tar.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2015, vol. 104(8). 1022 - 1025
    [viewed 08 May 2024]. Available from: https://publications.waset.org/pdf/10002200.